Question

【题目】— Look! Is it Sally playing under the tree?
—No, it _____ be her. She has gone to Xi'an.
A.can't
B.couldn't
C.may not
D.might not

Answer 1

【答案】A
【解析】句意：—看，是Sally在树下玩吗？—不，不可能是她，她去西安了。can't表示说话人的猜测；couldn't只使用于could的否定回答。may not表示不可能性。Might not比may not的可能性小。故选A。